CN108760823A - A kind of automobile-used chip oxygen sensor of motor and preparation method thereof - Google Patents
A kind of automobile-used chip oxygen sensor of motor and preparation method thereof Download PDFInfo
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Abstract
The invention discloses a kind of automobile-used chip oxygen sensors of motor, including are sequentially overlapped porous and protective layer, functional layer, diffusion layer and heating layer made of sintering from top to bottom；Porous and protective layer one end is porous oxidation aluminium substrate; porous and protective layer the other end is the first alumina substrate; functional layer includes the first zirconium oxide substrate, the inner and outer electrodes set on the first zirconium oxide substrate both sides; diffusion layer includes the second zirconium oxide substrate and the diffusion admittance above the second zirconium oxide substrate; heating layer includes the second alumina substrate being sequentially overlapped from top to bottom and third alumina substrate, and third alumina base on piece is equipped with heater；The automobile-used chip oxygen sensor of the motor at work, is applied with the pump electric current as test reference in the inner and outer electrodes；The invention also discloses a kind of preparation methods of the automobile-used chip oxygen sensor of motor；Structure of the invention is compact, is suitable for motorcycle exhaust exhaust system.
Description
Technical field
The present invention relates to sensor technical field, especially a kind of automobile-used chip oxygen sensor of motor and preparation method thereof.
Background technology
Currently, lambda sensor is widely used in car tail as essential element on closed-loop feed-back type electric injection system
In gas control system, to meet increasingly strict emission request.But with further increasing for environmental requirement, electric injection system also will
Mandatory use is on motorcycle.Therefore, develop a kind of lambda sensor suitable for motorcycle electric spraying system have become one it is tight
Urgent task.
From the point of view of functionally, motor oxygen sensor used in vehicle is consistent with oxygen sensor in use for car, that is, measures oxygen in tail gas and contain
Amount, is translated into electric signal, and electronic controller (ECU) controls Engine Injection Mass to realize with excessive sky according to this electric signal
Gas coefficient lambda=1 is the closed-loop control of target, to realize the completely burned of fuel oil, make ternary catalyzing unit to HC, CO in tail gas and
NOxThree kinds of pollutants have maximum transformation efficiency.From structure, the volume of motor oxygen sensor used in vehicle is than automobile
Lambda sensor is much smaller, therefore also referred to as miniature lambda sensor, and the general thinking of research is that the direct automobile oxygen that reduces senses
Body accumulates to achieve the goal, but there is still a need for redesigned to want to reach use to its structure for motorcycle use environment
It asks.
Currently, oxygen sensor in use for car structure includes mainly tubular type and chip, wherein tubular structure is due to bulky, no
It is suitble to motorcycle to use, therefore to its research is concentrated on slice structure.Currently, slice structure includes mainly all-zirconium oxide
Structure and zirconium oxide add aluminium oxide structure.Two kinds of structures can be with the thickness for increasing or decreasing flexibly control product of structure sheaf
Degree, but the former needs the presence of setting insulating layer and air reference chamber, width that cannot accomplish enough up and down due to heater
It is small；Although without insulating layer, still there is air reference chamber in structure, width also equally is difficult to accomplish sufficiently small in the latter.
And the size of air chamber is restricted, and is affected the diffusion of air and is easier to be contaminated, leads to output signal
Stability is poor.
Invention content
To solve problems of the prior art, the object of the present invention is to provide a kind of automobile-used chip oxygen sensors of motor
And preparation method thereof, the automobile-used chip oxygen sensor of motor of the invention carries heater, and the efficiency of heating surface is high, and the response time is short, together
When can ensure that sensor is in optimum working temperature at work, and preparation process is simple.
To achieve the above object, the technical solution adopted by the present invention is：A kind of automobile-used chip oxygen sensor of motor, including from
Top to bottm is sequentially overlapped porous and protective layer, functional layer, diffusion layer and heating layer made of sintering；It is described porous and protective layer
One end is porous oxidation aluminium substrate, and porous and protective layer the other end is the first alumina substrate, and the functional layer includes first
Zirconium oxide substrate, the inner and outer electrodes set on the first zirconium oxide substrate both sides, wherein external electrode are located at the first oxidation zirconium base
On piece is close to porous and protective layer side, and external electrode is completely covered in the porous oxidation aluminium substrate, and the first alumina substrate covers
Lid external electrode lead, the diffusion layer include the second zirconium oxide substrate and the diffusion admittance above the second zirconium oxide substrate,
The heating layer includes the second alumina substrate being sequentially overlapped from top to bottom and third alumina substrate, the third aluminium oxide
Substrate is equipped with heater.
Embodiment party's examination as one preferred, first zirconium oxide substrate and the first alumina base on piece are equipped with for outer
The electrode through-hole that contact conductor and internal electrode lead-wire pass through, the first alumina base on piece be equipped with for by external electrode lead and
A pair of electrodes pin that internal electrode lead-wire is drawn, the internal electrode lead-wire sequentially pass through the first zirconium oxide substrate and the first aluminium oxide
It is connect with one of electrode pin after electrode through-hole on substrate, the external electrode lead passes through the first alumina base on piece
It is connect with another electrode pin after electrode through-hole.
It being tried as another preferred embodiment party, the diffusion admittance is formed by escaping after material is sintered volatilization completely, and
One end of the diffusion admittance is contacted with the interior electrode, and the other end of diffusion admittance extends to the end of the second zirconium oxide substrate simultaneously
With air communication.
It is tried as another preferred embodiment party, the width of the diffusion admittance is 50 μm -100 μm, and thickness is 5 μm of -20 μ
m。
It is tried as another preferred embodiment party, the third alumina base on piece is equipped with to be added for what heater lead passed through
Hot device through-hole and heater pin for accessing heating voltage, heater lead pass through after heater through-hole with the heater
Pin connects.
It is tried as another preferred embodiment party, the pump electric current is 5 μ A-13 μ A.
A kind of preparation method of the automobile-used chip oxygen sensor of motor, includes the following steps：
1) zirconia ceramics slurry, aluminium oxide ceramics slurry and porous alumina ceramic slurry are prepared；
2) zirconia ceramics slurry, aluminium oxide ceramics slurry and porous alumina ceramic slurry are distinguished using casting technique
Corresponding substrate is prepared, then location hole is charged and attacked on each substrate by the way of mechanical punching, in the first aluminium oxide
Electrode through-hole is charged and attacked on substrate, the first zirconium oxide substrate, heater through-hole is charged and attacked in third alumina base on piece；
3) the electrode through-hole on the first alumina substrate and the first zirconium oxide substrate is filled and the pin that prints electrode,
Inner and outer electrodes are printed in the first zirconium oxide substrate both sides, the shape after the top printing-sintering volatilization of the second zirconium oxide substrate
Escape material at diffusion admittance, third alumina base on piece print heater, be carried out at the same time the filling of heater through-hole with
And printing heater pin；
4) press sequence from top to bottom by the substrate corresponding to porous and protective layer, functional layer, diffusion layer and heating layer into
Row lamination, is then compressed into entirety, and the ceramic block after lamination is cut into chip green compact using machine cuts；
5) chip green compact are put into load bearing board, load bearing board is put into air circulating oven and carries out slow dumping, wherein row
Glue maximum temperature is 600-800 DEG C, and the chip green compact of drained glue are put into sintering furnace and are sintered, sintering temperature 1350-
1500 DEG C, prepare the automobile-used chip oxygen sensor of motor after cooling.
Embodiment party as one preferred examination, in step 1), the zirconia ceramics slurry, aluminium oxide ceramics slurry and
Porous alumina ceramic slurry is prepared by the raw material of following mass percent：
Zirconia ceramics slurry：The aluminium oxide of the zirconium oxide of 75-92%, the yttrium oxide of 3-15% and 5-10% is configured to
Inorganic constituents adds and accounts for the dispersant of inorganic constituents gross mass 1-10%, accounts for the organic molten of inorganic constituents gross mass 40-60%
Agent, the bonding agent for accounting for inorganic constituents gross mass 5-15% and the plasticizer for accounting for inorganic constituents gross mass 5-15%；It is shape after ball milling
At zirconia ceramics slurry；
Aluminium oxide ceramics slurry：The sintering aid of the aluminium oxide of 80-97% and 3-20% is configured to inorganic constituents, then is added
Enter to account for the dispersant of inorganic constituents gross mass 1-10%, the organic solvent for accounting for inorganic constituents gross mass 40-70%, account for inorganic constituents
The bonding agent of gross mass 5-15% and the plasticizer for accounting for inorganic constituents gross mass 5-15%；Aluminium oxide ceramics slurry is formed after ball milling
Material；
Porous alumina ceramic slurry：The carbon dust of the aluminium oxide of 70-95%, 5-30% is configured to inorganic constituents, then is added
Enter to account for the dispersant of inorganic constituents gross mass 1-10%, the organic solvent for accounting for inorganic constituents gross mass 60-95%, account for inorganic constituents
The bonding agent of gross mass 5-15% and the plasticizer for accounting for inorganic constituents gross mass 5-15%；Woelm Alumina pottery is formed after ball milling
Porcelain slurry.
It is tried as another preferred embodiment party, the zirconium oxide is yttria-stabilized zirconia, and stabilized with yttrium oxide oxygen
The content for changing yttrium oxide in zirconium is 3mo l%-8mo l%.
The beneficial effects of the invention are as follows：
1, the automobile-used chip oxygen sensor of motor provided by the invention is passed using the form of pump testing current reference to chip oxygen
The use of sensor provides reference, and this form avoids traditional chip oxygen sensor since air pollution or air reference chamber are stifled
Plug causes reference gas oxygen concentration to change, while diffusion chamber can spread out oxygen extra at interior electrode, further ensure that
With reference to the stability of oxygen concentration, sensitivity and the precision of sensor test greatly improved in this way.
2, the present invention eliminates the air reference chamber instead width of traditional chip oxygen sensor in structure
It it is 50-100 μm, the narrow diffusion admittance that thickness is 5-20 μm keeps structure compacter, is more advantageous to the small-sized of sheet type sensor
Change, especially thickness and width, is allowed to be suitable for motorcycle exhaust exhaust system.
3, there is no air chamber in structure to the diffusion of heater heat, functional layer is enable faster to reach operating temperature
And it is heated evenly, is conducive to the response time of raising sheet type sensor, the stability and accuracy of signal.
4, the formula of zirconium oxide substrate is adjusted from formula both makes matched coefficients of thermal expansion, adjust alumina substrate and
The formula of porous oxidation aluminium substrate makes the two shrinking percentage and contraction rate matching, eliminates it and bends and divide during the work time
Layer, improve chip oxygen sensor yield rate and service life and simplify preparation process.
Description of the drawings
Fig. 1 is the structural schematic diagram of the automobile-used chip oxygen sensor of motor in the embodiment of the present invention；
Fig. 2 is the static saltus step figure of the automobile-used chip oxygen sensor of motor in the embodiment of the present invention；
Fig. 3 is the dynamic hop figure of the automobile-used chip oxygen sensor of motor in the embodiment of the present invention；
Reference numeral：
1, porous and protective layer, 11, porous oxidation aluminium substrate, the 12, first alumina substrate, 13, electrode pin, 2, function
Layer, the 21, first zirconium oxide substrate, 22, interior electrode, 23, external electrode, 3, diffusion layer, the 31, second zirconium oxide substrate, 32, diffusion it is logical
Road, 4, heating layer, the 41, second alumina substrate, 42, third alumina substrate, 43, heater, 44, heating pin.
Specific implementation mode
The embodiment of the present invention is described in detail below in conjunction with the accompanying drawings.
Embodiment 1
A kind of automobile-used chip oxygen sensor of motor, including from top to bottom be sequentially overlapped sintering made of porous and protective layer 1,
Functional layer 2, diffusion layer 3 and heating layer 4；Described porous and protective layer 1 one end is porous oxidation aluminium substrate 11, porous and protection
The other end of layer 1 is the first alumina substrate 12, and the functional layer 2 includes the first zirconium oxide substrate 21, is set to the first zirconium oxide
The interior electrode 22 and external electrode 23 of 21 both sides of substrate, wherein external electrode 23 are located on the first zirconium oxide substrate 21 close to porous and guarantor
1 side of sheath, and external electrode 23 is completely covered in the porous oxidation aluminium substrate 11, the first alumina substrate 12 covering external electrode draws
Line, the diffusion layer 3 includes the second zirconium oxide substrate 31 and the diffusion admittance 32 above the second zirconium oxide substrate 31, described
Heating layer 4 includes the second alumina substrate 41 being sequentially overlapped from top to bottom and third alumina substrate 42, the third oxidation
Aluminium substrate 42 is equipped with heater 43, and the second oxidation substrate 41 can prevent heater 43 from directly being connect with the second zirconium oxide substrate 31
It touches, causes heater 43 short-circuit at work；The automobile-used chip oxygen sensor of the motor at work, the interior electrode 22 and dispatch from foreign news agency
Pump electric currents of the 5 μ A-13 μ A as test reference is applied on pole 23.
It is equipped with for 23 lead of external electrode and interior electrode on first zirconium oxide substrate, 21 and first alumina substrate 12
The electrode through-hole that 22 leads pass through, first alumina substrate 12 are equipped with for drawing 23 lead of external electrode and interior electrode 22
A pair of electrodes pin 13 that line is drawn, 22 lead of interior electrode sequentially pass through the first zirconium oxide substrate 21 and the first alumina base
It is connect with one of electrode pin 13 after electrode through-hole on piece 12, the external electrode lead passes through the first alumina substrate 12
On electrode through-hole after connect with another electrode pin 13.
The diffusion admittance 31 by escape material sintering completely volatilization after formed, and one end of the diffusion admittance 31 with it is described
Interior electrode 22 contacts, and the other end of diffusion admittance 31 extends to end and and the air communication of the second zirconium oxide substrate 31.
The width of the diffusion admittance 31 is 50 μm -100 μm, and thickness is 5 μm -20 μm.
The third alumina substrate 42 adds equipped with the heater through-hole passed through for 43 lead of heater and for accessing
The heater pin 44 of thermal voltage, 43 lead of heater are connect after passing through heater through-hole with the heater pin 44.
Embodiment 2
A kind of preparation method of the automobile-used chip oxygen sensor of motor, includes the following steps：
1) zirconia ceramics slurry, aluminium oxide ceramics slurry and porous alumina ceramic slurry are prepared：
It is prepared by the raw material of following mass percent：
Zirconia ceramics slurry：By yttria-stabilized zirconia that the content of 75% yttrium oxide is 3mo l%, 15%
Yttrium oxide and 10% aluminium oxide are configured to inorganic constituents, add account for the dispersant of inorganic constituents gross mass 1%, account for it is inorganic at
The organic solvent of point gross mass 40%, the plasticising for accounting for the bonding agent of inorganic constituents gross mass 5% and accounting for inorganic constituents gross mass 5%
Agent；Zirconia ceramics slurry is formed after ball milling；
Aluminium oxide ceramics slurry：The sintering aid of 80% aluminium oxide and 20% is configured to inorganic constituents, adds and accounts for
The dispersant of inorganic constituents gross mass 1%, accounts for inorganic constituents gross mass 5% at the organic solvent for accounting for inorganic constituents gross mass 40%
Bonding agent and account for the plasticizer of inorganic constituents gross mass 5%；Aluminium oxide ceramics slurry is formed after ball milling；
Porous alumina ceramic slurry：The carbon dust of 70% aluminium oxide, 30% is configured to inorganic constituents, adds and accounts for nothing
The dispersant of machine ingredient gross mass 1%, accounts for inorganic constituents gross mass 5% at the organic solvent for accounting for inorganic constituents gross mass 60%
Bonding agent and the plasticizer for accounting for inorganic constituents gross mass 5%；Porous alumina ceramic slurry is formed after ball milling.
2) zirconia ceramics slurry, aluminium oxide ceramics slurry and porous alumina ceramic slurry are distinguished using casting technique
Corresponding substrate is prepared, then location hole is charged and attacked on each substrate by the way of mechanical punching, in the first aluminium oxide
Electrode through-hole is charged and attacked on substrate 12, the first zirconium oxide substrate 21, heater through-hole is charged and attacked on third alumina substrate 42；
3) the electrode through-hole on the first alumina substrate 12 and the first zirconium oxide substrate 21 is filled and is printed electrode
Pin 13, electrode 22 and external electrode 23 in 21 both sides of the first zirconium oxide substrate are printed, in the top of the second zirconium oxide substrate 31
Diffusion admittance 32 is formed after printing-sintering volatilization escapes material, escapes material and the sintering such as carbon, organic matter volatilization specifically can be selected
Material prints heater 43 on third alumina substrate 42, is carried out at the same time filling and the printing heater of heater through-hole
Pin 44；
4) sequence from top to bottom is pressed by the base corresponding to porous and protective layer 1, functional layer 2, diffusion layer 3 and heating layer 4
Piece carries out lamination, is then compressed into entirety, the ceramic block after lamination is cut into chip green compact using machine cuts；
5) chip green compact are put into load bearing board, load bearing board is put into air circulating oven and carries out slow dumping, wherein row
Glue maximum temperature is 600 DEG C, and the chip green compact of drained glue are put into sintering furnace and are sintered, and sintering temperature is 1350 DEG C, is waited for
The automobile-used chip oxygen sensor of motor is prepared after cooling.
Embodiment 3
A kind of preparation method of the automobile-used chip oxygen sensor of motor, includes the following steps：
1) zirconia ceramics slurry, aluminium oxide ceramics slurry and porous alumina ceramic slurry are prepared：
It is prepared by the raw material of following mass percent：
Zirconia ceramics slurry：By yttria-stabilized zirconia that the content of 92% yttrium oxide is 8mo l%, 3%
Yttrium oxide and 5% aluminium oxide are configured to inorganic constituents, add account for the dispersant of inorganic constituents gross mass 8%, account for it is inorganic at
The organic solvent of point gross mass 50%, the increasing for accounting for the bonding agent of inorganic constituents gross mass 10% and accounting for inorganic constituents gross mass 10%
Mould agent；Zirconia ceramics slurry is formed after ball milling；
Aluminium oxide ceramics slurry：The sintering aid of 97% aluminium oxide and 3% is configured to inorganic constituents, adds and accounts for nothing
The dispersant of machine ingredient gross mass 8%, accounts for inorganic constituents gross mass 10% at the organic solvent for accounting for inorganic constituents gross mass 55%
Bonding agent and the plasticizer for accounting for inorganic constituents gross mass 10%；Aluminium oxide ceramics slurry is formed after ball milling；
Porous alumina ceramic slurry：The carbon dust of 95% aluminium oxide, 5% is configured to inorganic constituents, adds and accounts for nothing
The dispersant of machine ingredient gross mass 8%, accounts for inorganic constituents gross mass 10% at the organic solvent for accounting for inorganic constituents gross mass 75%
Bonding agent and the plasticizer for accounting for inorganic constituents gross mass 10%；Porous alumina ceramic slurry is formed after ball milling.
2) zirconia ceramics slurry, aluminium oxide ceramics slurry and porous alumina ceramic slurry are distinguished using casting technique
Corresponding substrate is prepared, then location hole is charged and attacked on each substrate by the way of mechanical punching, in the first aluminium oxide
Electrode through-hole is charged and attacked on substrate 12, the first zirconium oxide substrate 21, heater through-hole is charged and attacked on third alumina substrate 42；
3) the electrode through-hole on the first alumina substrate 12 and the first zirconium oxide substrate 21 is filled and is printed electrode
Pin 13, electrode 22 and external electrode 23 in 21 both sides of the first zirconium oxide substrate are printed, in the top of the second zirconium oxide substrate 31
Diffusion admittance 32 is formed after printing-sintering volatilization escapes material, escapes material and the sintering such as carbon, organic matter volatilization specifically can be selected
Material prints heater 43 on third alumina substrate 42, is carried out at the same time filling and the printing heater of heater through-hole
Pin 44；
4) sequence from top to bottom is pressed by the base corresponding to porous and protective layer 1, functional layer 2, diffusion layer 3 and heating layer 4
Piece carries out lamination, is then compressed into entirety, the ceramic block after lamination is cut into chip green compact using machine cuts；
5) chip green compact are put into load bearing board, load bearing board is put into air circulating oven and carries out slow dumping, wherein row
Glue maximum temperature is 700 DEG C, and the chip green compact of drained glue are put into sintering furnace and are sintered, and sintering temperature is 1400 DEG C, is waited for
The automobile-used chip oxygen sensor of motor is prepared after cooling.
Embodiment 4
A kind of preparation method of the automobile-used chip oxygen sensor of motor, includes the following steps：
1) zirconia ceramics slurry, aluminium oxide ceramics slurry and porous alumina ceramic slurry are prepared：
It is prepared by the raw material of following mass percent：
Zirconia ceramics slurry：By yttria-stabilized zirconia that the content of 85% yttrium oxide is 5mo l%, 8%
Yttrium oxide and 7% aluminium oxide are configured to inorganic constituents, add account for the dispersant of inorganic constituents gross mass 10%, account for it is inorganic at
The organic solvent of point gross mass 60%, the increasing for accounting for the bonding agent of inorganic constituents gross mass 15% and accounting for inorganic constituents gross mass 15%
Mould agent；Zirconia ceramics slurry is formed after ball milling；
Aluminium oxide ceramics slurry：The sintering aid of 90% aluminium oxide and 10% is configured to inorganic constituents, adds and accounts for
The dispersant of inorganic constituents gross mass 10%, accounts for inorganic constituents gross mass at the organic solvent for accounting for inorganic constituents gross mass 70%
15% bonding agent and the plasticizer for accounting for inorganic constituents gross mass 15%；Aluminium oxide ceramics slurry is formed after ball milling；
Porous alumina ceramic slurry：The carbon dust of 80% aluminium oxide, 20% is configured to inorganic constituents, adds and accounts for nothing
The dispersant of machine ingredient gross mass 10%, accounts for inorganic constituents gross mass 15% at the organic solvent for accounting for inorganic constituents gross mass 95%
Bonding agent and account for the plasticizer of inorganic constituents gross mass 15%；Porous alumina ceramic slurry is formed after ball milling.
2) zirconia ceramics slurry, aluminium oxide ceramics slurry and porous alumina ceramic slurry are distinguished using casting technique
Corresponding substrate is prepared, then location hole is charged and attacked on each substrate by the way of mechanical punching, in the first aluminium oxide
Electrode through-hole is charged and attacked on substrate 12, the first zirconium oxide substrate 21, heater through-hole is charged and attacked on third alumina substrate 42；
3) the electrode through-hole on the first alumina substrate 12 and the first zirconium oxide substrate 21 is filled and is printed electrode
Pin 13, electrode 22 and external electrode 23 in 21 both sides of the first zirconium oxide substrate are printed, in the top of the second zirconium oxide substrate 31
Diffusion admittance 32 is formed after printing-sintering volatilization escapes material, escapes material and the sintering such as carbon, organic matter volatilization specifically can be selected
Material prints heater 43 on third alumina substrate 42, is carried out at the same time filling and the printing heater of heater through-hole
Pin 44；
4) sequence from top to bottom is pressed by the base corresponding to porous and protective layer 1, functional layer 2, diffusion layer 3 and heating layer 4
Piece carries out lamination, is then compressed into entirety, the ceramic block after lamination is cut into chip green compact using machine cuts；
5) chip green compact are put into load bearing board, load bearing board is put into air circulating oven and carries out slow dumping, wherein row
Glue maximum temperature is 800 DEG C, and the chip green compact of drained glue are put into sintering furnace and are sintered, and sintering temperature is 1500 DEG C, is waited for
The automobile-used chip oxygen sensor of motor is prepared after cooling.
In test, at work by the automobile-used chip oxygen sensor of motor obtained by above-described embodiment, in interior electrode, outside
Apply the pump electric current of 5-13 μ A on electrode as test reference.
Fig. 2 is the static saltus step figure of the automobile-used chip oxygen sensor of motor in the embodiment of the present invention, is passed through during the test
The adjusting of flowmeter prepares the N2, O2, CO of various concentration respectively, and the mixed gas of H2, CO2 simulates motorcycle exhaust content,
Simultaneously change λ from 0.95 to 1.05.As can be seen that output voltage saltus step occurs in λ=1 from test result.Illustrate this
Sensor accurately can provide engine behavior by the sign mutation near λ=1 to ECU, by ECU to engine
Working condition is controlled, and makes it in the lower work in chemically correct fuel λ=1.
Fig. 3 is the dynamic hop figure of the automobile-used chip oxygen sensor of motor in the embodiment of the present invention, and when test prepares gaseous mixture
Body makes λ be converted repeatedly between 0.95 and 1.05, and the waveform voltage of sensor is recorded using data collecting system.It can from result
To find out, which is in the reproducible of saltus step repeatedly between 0.95 and 1.05 in λ, and voltage declines on the left sides 1S from rising to
Right completion illustrates that the response time of sensor is fast, and it is also preferable to convert its sensitivity simultaneously for different atmosphere.
Specific implementation mode of the invention above described embodiment only expresses, the description thereof is more specific and detailed, but simultaneously
Cannot the limitation to the scope of the claims of the present invention therefore be interpreted as.It should be pointed out that for those of ordinary skill in the art
For, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the guarantor of the present invention
Protect range.
Claims (9)
1. a kind of automobile-used chip oxygen sensor of motor, which is characterized in that porous made of sintering including being sequentially overlapped from top to bottom
And protective layer, functional layer, diffusion layer and heating layer；Described porous and protective layer one end be porous oxidation aluminium substrate, it is porous and
The other end of protective layer is the first alumina substrate, and the functional layer includes the first zirconium oxide substrate, is set to the first oxidation zirconium base
The inner and outer electrodes of piece both sides, wherein external electrode are located on the first zirconium oxide substrate close to porous and protective layer side, and
External electrode is completely covered in the porous oxidation aluminium substrate, and the first alumina substrate covers external electrode lead, and the diffusion layer includes
Second zirconium oxide substrate and the diffusion admittance above the second zirconium oxide substrate, the heating layer include folding successively from top to bottom
The second alumina substrate and third alumina substrate added, the third alumina base on piece are equipped with heater；The motor is automobile-used
Chip oxygen sensor at work, is applied with the pump electric current as test reference in the inner and outer electrodes.
2. the automobile-used chip oxygen sensor of motor according to claim 1, which is characterized in that first zirconium oxide substrate and
First alumina base on piece is equipped with the electrode through-hole passed through for external electrode lead and internal electrode lead-wire, first alumina base
On piece is equipped with for by a pair of electrodes pin of external electrode lead and internal electrode lead-wire extraction, the internal electrode lead-wire to sequentially pass through
It is connect with one of electrode pin after first zirconium oxide substrate and the electrode through-hole of the first alumina base on piece, the external electrode
Lead is connect after the electrode through-hole of the first alumina base on piece with another electrode pin.
3. the automobile-used chip oxygen sensor of motor according to claim 1, which is characterized in that the diffusion admittance is by escaping material
It is formed after material sintering volatilization completely, and one end of the diffusion admittance is contacted with the interior electrode, the other end of diffusion admittance extends
To the end of the second zirconium oxide substrate and and air communication.
4. the automobile-used chip oxygen sensor of motor according to claim 1 or 3, which is characterized in that the width of the diffusion admittance
Degree is 50 μm -100 μm, and thickness is 5 μm -20 μm.
5. the automobile-used chip oxygen sensor of motor according to claim 1, which is characterized in that the third alumina base on piece
Heater pin equipped with the heater through-hole passed through for heater lead and for accessing heating voltage, heater lead pass through
It is connect with the heater pin after heater through-hole.
6. the automobile-used chip oxygen sensor of motor according to claim 1, which is characterized in that the pump electric current is 5 μ A-13 μ
A。
7. a kind of preparation method of the automobile-used chip oxygen sensor of motor, which is characterized in that include the following steps：
1) zirconia ceramics slurry, aluminium oxide ceramics slurry and porous alumina ceramic slurry are prepared；
2) zirconia ceramics slurry, aluminium oxide ceramics slurry and porous alumina ceramic slurry are prepared respectively using casting technique
Obtain corresponding substrate, then charge and attack location hole on each substrate by the way of mechanical punching, the first alumina substrate,
Electrode through-hole is charged and attacked on first zirconium oxide substrate, and heater through-hole is charged and attacked in third alumina base on piece；
3) the electrode through-hole on the first alumina substrate and the first zirconium oxide substrate is filled and the pin that prints electrode,
Inner and outer electrodes are printed in one zirconium oxide substrate both sides, are formed and are expanded after the top printing-sintering volatilization of the second zirconium oxide substrate
Dissipate channel escapes material, prints heater in third alumina base on piece, is carried out at the same time filling and the print of heater through-hole
Brush heater pin；
4) substrate corresponding to porous and protective layer, functional layer, diffusion layer and heating layer is folded by sequence from top to bottom
Layer, is then compressed into entirety, the ceramic block after lamination is cut into chip green compact using machine cuts；
5) chip green compact are put into load bearing board, load bearing board is put into air circulating oven and carries out slow dumping, wherein dumping is most
High-temperature is 600-800 DEG C, and the chip green compact of drained glue are put into sintering furnace and are sintered, sintering temperature 1350-1500
DEG C, prepare the automobile-used chip oxygen sensor of motor after cooling.
8. the preparation method of the automobile-used chip oxygen sensor of motor according to claim 7, which is characterized in that in step 1)
In, the zirconia ceramics slurry, aluminium oxide ceramics slurry and porous alumina ceramic slurry press the original of following mass percent
Material is prepared：
Zirconia ceramics slurry：The aluminium oxide of the zirconium oxide of 75-92%, the yttrium oxide of 3-15% and 5-10% is configured to inorganic
Ingredient, add and account for the dispersant of inorganic constituents gross mass 1-10%, the organic solvent that accounts for inorganic constituents gross mass 40-60%,
It accounts for the bonding agent of inorganic constituents gross mass 5-15% and accounts for the plasticizer of inorganic constituents gross mass 5-15%；Oxygen is formed after ball milling
Change zircon ceramic slurry；
Aluminium oxide ceramics slurry：The sintering aid of the aluminium oxide of 80-97% and 3-20% is configured to inorganic constituents, adds and accounts for
The dispersant of inorganic constituents gross mass 1-10%, accounts for the total matter of inorganic constituents at the organic solvent for accounting for inorganic constituents gross mass 40-70%
It measures the bonding agent of 5-15% and accounts for the plasticizer of inorganic constituents gross mass 5-15%；Aluminium oxide ceramics slurry is formed after ball milling；
Porous alumina ceramic slurry：The carbon dust of the aluminium oxide of 70-95%, 5-30% are configured to inorganic constituents, adds and accounts for
The dispersant of inorganic constituents gross mass 1-10%, accounts for the total matter of inorganic constituents at the organic solvent for accounting for inorganic constituents gross mass 60-95%
It measures the bonding agent of 5-15% and accounts for the plasticizer of inorganic constituents gross mass 5-15%；Porous alumina ceramic slurry is formed after ball milling
Material.
9. the preparation method of the automobile-used chip oxygen sensor of motor according to claim 8, which is characterized in that the zirconium oxide
For yttria-stabilized zirconia, and the content of yttrium oxide is 3mo l%-8mo l% in yttria-stabilized zirconia.
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| CN201810574355.XA CN108760823B (en) | 2018-06-06 | 2018-06-06 | Sheet type oxygen sensor for motorcycle and preparation method thereof |
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| CN201810574355.XA CN108760823B (en) | 2018-06-06 | 2018-06-06 | Sheet type oxygen sensor for motorcycle and preparation method thereof |
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Cited By (1)
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| CN111521661A (en) * | 2020-05-25 | 2020-08-11 | 深圳安培龙科技股份有限公司 | Reference pump current type oxygen sensor |
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